<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>作业2</title>
    <style>
        .main{
            width: 996px;
            height: 619px;
        }
        .center{
            width:996px ;
            height: 386px;
            background-color: white;

        }
        .f1,.f2{
            display: flex;
        }
        .f1{
            width: 996px;
            height: 386px;
        }
        .left1{
            width: 611px;
            height: 376px;
            background-color: grey;
            float: left;
            margin-right: 10px;
            margin-bottom: 10px;
        }
        .right{
            width: 375px;
            height: 376px;
            background-color: yellow;
            float: right;
            margin-bottom: 10px;
        }
        .f2{
            width: 1004px;
            height: 233px;
        }
        .left{
            width: 366px;
            height: 233px;
        background-color: pink;
        float: left;
            margin-right: 20px;
        }
        .card1{
            width: 198px;
            height: 233px;
            background-color: #0aa1ed;
            float: right;
            margin-right: 8px;
        }
        .card2{
            width: 198px;
            height: 233px;
            background-color: #0aa1ed;
            float: right;
            margin-right: 8px;
        }
        .card3{
            width: 198px;
            height: 233px;
            background-color: #0aa1ed;
            float: right;
        }
    </style>
</head>
<body>
<div class="main">
    <div class="center">
        <div class="f1">
            <div class="left1"></div>
            <div class="right"></div>
        </div>
        <div class="f2">
            <div class="left"></div>
            <div class="card1"></div>
            <div class="card2"></div>
            <div class="card3"></div>
        </div>
    </div>
</div>
</body>
</html>